Lensed dual-chip fiber-coupler for providing an aiming beam in an infrared radiation delivery apparatus

摘要

Laser treatment apparatus includes one diode-laser providing infrared radiation for the treatment and another diode-laser for providing visible radiation. A lens launches the infrared and visible radiations from the diode-lasers into the entrance face of the optical fiber for transporting the radiations to a treatment location.

主权项

1. Optical apparatus used for dental and medical procedures, comprising:
first and second diode-lasers, the first diode-laser arranged to emit a first beam of radiation having an infrared wavelength and the second diode-laser arranged to emit a second beam of radiation having a visible wavelength; an optical fiber having a core surrounded by a cladding and an entrance face and an exit face; and a lens arranged to launch the infrared and visible radiation from the diode-lasers into the core of the optical fiber through the entrance face thereof the optical fiber and wherein the propagation axis of the second beam is spaced from the optical axis of the lens a distance greater than the spacing between the propagation axis of the first beam and the optical axis of the lens so that the launch numerical aperture of the second beam as the second beam enters the optical fiber is greater than the launch numerical aperture of the first beam, so that the second beam excites higher order modes in the fiber compared to the first beam and wherein the optical fiber has a length selected such that the visible radiation leaves the exit face with a circularly symmetrical annularly weighted intensity distribution.